Release 4.2. #730

Job	Run time
linux-gcc-ubsan-ootree	16m 21s
linux-gcc-valgrind-ootree	23m 17s
linux-gcc-debug-ootree-skeleton	6m 18s
linux-gcc-asan-ootree	8m 36s
macos-clang-debug-intree-skeleton	5m 9s
macos-clang-debug-ootree-skeleton	5m 42s
linux-gcc-release-ootree-skeleton	5m 10s
windows-msvc-debug-intree	9m 18s
macos-clang-release-ootree-skeleton	4m 12s
windows-msvc-debug-ootree	7m 40s
linux-gcc-debug-intree-m32-skeleton	6m 23s
windows-msvc-release-ootree	8m 19s
	1h 46m 25s

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